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Paper: A Search for Companions to the Pulsating sdB Star EC 20117–4014
Volume: 509, 20th European Workshop on White Dwarfs (EuroWD16)
Page: 363
Authors: Otani, T.; Oswalt, T.; Amaral, M.; Jordan, R.
Abstract: EC 20117–4014 is known to be a spectroscopic binary system consisting of an sdB star and F5V star. It was monitored using the SARA-CT telescope in Cerro Tololo, Chile over several observing seasons. Periodic O-C variations were detected in the two highest amplitude pulsations in EC 20117–4014, permitting detection of the F5V companion, whose period and semimajor axis were previously unknown.
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